Speakers buzzing help?

L.V

CarAudio.com Newbie
Nov 21, 2022
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0
Would it be my amp is dying?
Ive had it for 4 years (machete 80.4)
The speakers buzz at any volume, any mode (AM/FM bluetooth, USB) I have done the big 3 upgrade. All wires are OFC wire from amps to speakers. The sub is just fine but all channels off the 4channel amp buzz.
Heres the kicker and what I cant find an answer to. The buzzing completely stops when its on LPF setting… HPF or Lp/Hp filters the buzzing comes back.
F913D739-5227-409E-A95B-2B0D4816C0EB.jpeg
 

Jimi77

CarAudio.com VIP
Sep 17, 2017
2,251
702
LPF is filtering out high frequency buzz??? Check grounds and connections. Does it buzz when the engine isn't running?
 
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L.V

CarAudio.com Newbie
Nov 21, 2022
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  • Thread Starter Thread Starter
  • #3
LPF is filtering out high frequency buzz??? Check grounds and connections. Does it buzz when the engine isn't running?
Yes, it buzzes engine off and all grounds are good. I have tested them several times
 

dragon.breath

Senior VIP Member
10+ year member
Nov 22, 2007
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Try removing the rca cables from the amplifier and then turning it on. If the noise goes away, it is not the amplifier or speaker wiring, and you have a head unit or rca wiring problem.
If the noise is still there without the rcas connected, then the amplifier, or wiring is bad.
 

audiobaun

CarAudio.com Veteran
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10+ year member
Jun 28, 2011
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What HU are you running?? Curious. Very well could be RCAs or the HU
 
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L.V

CarAudio.com Newbie
Nov 21, 2022
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  • #8
Try removing the rca cables from the amplifier and then turning it on. If the noise goes away, it is not the amplifier or speaker wiring, and you have a head unit or rca wiring problem.
If the noise is still there without the rcas connected, then the amplifier, or wiring is bad.
The buzz does go away when i disconnect the RCAs.
 

L.V

CarAudio.com Newbie
Nov 21, 2022
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One thing that is also making no sense. When putting pressure on the gain adjustment knobs or any subsequent adjustments on the amp. The buzz will increase or decrease, again just pressing or wiggling the knobs and not turning will change the severity of the buzz. Any ideas?
 

Jimi77

CarAudio.com VIP
Sep 17, 2017
2,251
702
One thing that is also making no sense. When putting pressure on the gain adjustment knobs or any subsequent adjustments on the amp. The buzz will increase or decrease, again just pressing or wiggling the knobs and not turning will change the severity of the buzz. Any ideas?
Seen that before. My guess is the connection/s between the preamp/input board and the main board are failing.
 
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L.V

CarAudio.com Newbie
Nov 21, 2022
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Seen that before. My guess is the connection/s between the preamp/input board and the main board are failing.
I am very familiar with soldering and electronics. Would that be something I can go in there and fix?
 

Jimi77

CarAudio.com VIP
Sep 17, 2017
2,251
702
I am very familiar with soldering and electronics. Would that be something I can go in there and fix?
It could be something you could fix. Typically bad solder joints. Good luck.
 
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audiobaun

CarAudio.com Veteran
5,000+ posts
10+ year member
Jun 28, 2011
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One thing that is also making no sense. When putting pressure on the gain adjustment knobs or any subsequent adjustments on the amp. The buzz will increase or decrease, again just pressing or wiggling the knobs and not turning will change the severity of the buzz. Any ideas?
If you are having that kind of issue with noise when tuning.. and If the amplifier is still under warranty.. Id send it back for a replacement or repair. If not .. get some can air and spray to tuning pods and work them up and down several times. Sometimes it helps get dust ect cleared out. But May need to be replaced on the board
 

audiobaun

CarAudio.com Veteran
5,000+ posts
10+ year member
Jun 28, 2011
13,293
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I forgot.. you have had the amp for four years.. No warranty applies after 1 year on most electronics these days
 

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